Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b7afbf835863aceca96a671713f746baaaf9cf865421b90ba9b3df39108a9c' 
  AND token = 'P6s/THOatHJjdU+nFzrZXOzQNxlU8n0AsK+6A/I3XCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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