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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '780bd60afb4052b6d9aa935fd658ed9c93c72f7a39ecc269b2e7a4501b234ba0' 
  AND token = 'x8RqLyPvGh94Yab6X0NYrhMOJrOh/YeUx65YyttFoZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}