Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fe40e39110ba2a213ff52c72a49621f29c5486baf4e7e39ee87a78c7539f935' 
  AND token = 'xWQxzniDTeC+tEZAZuMw/sWMIIneckYG22bKxv/Fq6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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