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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e53ae15c13f7976c4c76dec54d6a2f25d23dd14d5d7e5a1b7bfc9ca894e48f24' 
  AND token = 'EElIOudqj+dh3hGT8LllqvAJ9lAbwkyjY7g2J85D6sc=' 
  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"
    }
  }
}