Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75592f858e30f52257b1df4e458f8f4861aec532aac42554c8464ad33c39844f' 
  AND token = 'fOBr1kdu4Mbprv8lt/ijHUUkSs7g5FTTmP4NRHTaNSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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