Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03c040d99fb7e8a2e57e1e82094500b932b0ed8bf9a62ba13ce3a5b0ae6581d3' 
  AND token = 'YPX2bTQHVaSMBTjWmyAgNvaCWaXaYTOHi6uXYKdloUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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