Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c272ff03e7175f6eaeaafe551b947aa18b680acb2c776cd7bba3a0b444f4209d' 
  AND token = '+6s++ApibhlycivSDRWvSMOtkcVKYtz6krspiQ/fFxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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