Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4577f773e9f21304e04f258dbba06c24b580da4bf28d56d90663a006e092194' 
  AND token = 'o6RGmvpVYfPqyUXtb+ksvEdAY+dRwa8PJp040yeiY8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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