Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3acbd31ba78f042552cf8c7874028f4adfa40e3aae79656e68b4c3ea75ae7a44' 
  AND token = 'i3+8aUTzCoLZhdWScyMHetUX2SEN+9P5ezFr8iGJKiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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