Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc0fb07aba56b50e85fac1b98ed9e0cbb51c7f4726e633fb45d65b23d0f4d931' 
  AND token = 'LTBXJX0pRt7HK4P5E5XS/4pfJZ9ODasQNhsnlS2YcF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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