Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d7b0beb205663d3c8685dd27b1478264845765e6101021cd8d8e0c9df784fea' 
  AND token = '79QhTdJsnyLkPEt2T9JSaCSQ14ulABQG+XCGsh/8VV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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