Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d8a4645570640c3d2378533624d77d19e059d5b67e8d67f9484cb423adc1138' 
  AND token = 'd2R7zhUmiqu2UTWzsPNKlq5JeDxXofQAvkgY2dzXg48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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