Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f556b7efb242bcb70a811562ea435bd97b0b8a02f34ef2e32f12c935b1ca277d' 
  AND token = 'osEYM54U0tXeMg1Gc90K6kVyDIV3zFcnzDA4CD3wQuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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