Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb5adec3211f4fda1cfd2799b21aba8674aa25e3dde5170dc4e1ac6909a2fa61' 
  AND token = '2KAqbCH+BC4A0CQ3AoTFvfZC5vkUWMnlmUru1KX9xzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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