Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a77a80a16909c25efb1df38770ecd4e1721dfecd933ea01adaf47b977058bdd' 
  AND token = 'UAkAGdGTDgAWmwE+nfpe7DsCJC9YQ45EFEgzda93u00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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