Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa652d4ef25dbae43a3a450122588bdf92dd4a9e1bdbd924c57287787d858261' 
  AND token = 'nKtD2x6jCrR9jiaqJ2PbEhrHFApM6mvVqIkjdaN8M1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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