Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2afd0bb98b6835b0ac0196841cd66366d2c7c5bebfbc3ee16c74324b78fc7ce1' 
  AND token = 'deXSEFMkQJh4lC7eETHJBFQsI0xBEUV81gmCM8GkL08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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