Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a925017a4e807a8703c41cac2f4215b39ca171aaa22a16540cd3d0dea32da33' 
  AND token = '+Kap85nmiDl8dsy+Uwmoyp5P3alauFxM0iWfAwQ594Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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