Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98bf1d38561dca9b86f3cc8040d948a7fdcdb886601075779213511b55380ea8' 
  AND token = 'feUFbR4zPZsIGzkyS5OoPzmdgKAlKPBWvkxGjHUh044=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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