Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '814689ef68b12468a2c484a3f3d85db6b6b928c89f4b4b7a03cd30d0011755d6' 
  AND token = 'rctQIwv6cW6Kl6WhFgHqa+r67k7Q2TywkrkVqDeQgTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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