Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28aa0451a8365f49b055e8588a8452a8bd8e1907df010497e4d9b638f951558d' 
  AND token = 'nd5OHcr5ljKX9egjzVlpN0tFkvbIXISpg4GnCJPaqm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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