Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2183da9dc510e891d0f1cded61a7f5639bd8629efea3fca98080b7d115f37f2' 
  AND token = '49DZCDsvOTmZTC40mQ1GzFV6xB93e/i1YYudVUUJRaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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