Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0b40891f48f02cf7fa9dc70ac6257ee6f158222b3403b4b4bc81f5e0e5ae8053' 
  AND token = 'xTyc6vBpHw42RrY1L2OC6Iovy4ct14BjKin+g3xP4m8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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