Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c2f915be33c26753de0914d63b72664618c1affee28ecdec8a2c65b238102cf' 
  AND token = 'm+/CS+mxFijWmrG00ErTdqYTAUD91binxODdRGOKLAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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