Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '657fb2fcb42f66fa6172184e7319930a4607230c546ac288b05b670c11e62e80' 
  AND token = 'pEFDdWMap3onPP+KEM6erxpOTz5qY6JT77a6tVf99FM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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