Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03e1caf28856f48646615c9d70299a8cbe48d25fa20402ba09f6ad1abdb8f476' 
  AND token = '6M4fpYbvJwzAaxiY7JmkXCUAI2p6L3si0avghA1ACk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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