Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ba7d25a69e1d370c3a8053749b5ca2626767b725c12bd5ec5af4614a3b63dc1' 
  AND token = 'h7zh2tHB+eViG+EHTi2iNDNe/zKegZmJZLi41aWuL4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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