Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1af6a8a0bbc3a7e571c173c26a32ade984fb132992aabea4f0f5bc5b34e8f66d' 
  AND token = 'P2peCvPrEZOe1J8gpLeELSx0VlsGLI7f3i1+uLx9urk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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