Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3cdf79b73f7afda584d9f8a8f015fbaf7d11d2fce7942afb73811ca8929f8e' 
  AND token = '5F+v+xpeQJemPhyz1FP4KMPZwP2MStbgzoQz+V5Za24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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