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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '55383581073eca7b20218037d7e68bcc630145aa48282d045bc576adc8341660' 
  AND token = 'SEWLSjCUPcCQf+AcqLAIcJqiEl7CiCq9jJ6RBLqEn+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}