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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0d8d06155f68d33a78aee3e94840c4aa9f1ae2edc2e5bb32e73d5ec9498207a7' 
  AND token = 'C40OWaG7I0LTbuwavccvpBJuCJrqhdeDU9KkK4caPRQ=' 
  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"
    }
  }
}