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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d557c1633d13200f8b0b8aa024c82affbef189eb8235d84bf753dbf9fb38008' 
  AND token = 'QK/VBd1x9bmopjq/BIGDgLK5ET0irQ1S4toW3uoMwj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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