Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f230fbc702032a0dc9850ac7aff290795c768b1919bf5840dd146a7e80038b25' 
  AND token = 'j8uL/MGf9WScnEO+2YchB6V76BuBam3qrtMFmwtpBQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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