Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '787e3f77ec4b1a3b39e6cc39b7570042e131fb4c793a704d5cbcc67c511c002d' 
  AND token = 'ospaNGINQq+S20ym8YhtujP0VtE7ZXV17jioI45QL4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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