Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e43b3de73bc8b117d35ad70e1cee93fc6fb21004e0174a2e3914a896854ecc9f' 
  AND token = 'r0Q8KV64/tLbkLjutcdSI4AMfslErCEnW3IQIntclsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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