Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '378305f8fd913b7537226c318bd843c662628edab76a7e7eb3099f91eac65104' 
  AND token = 'Bl/SNSiSc5IX00MMh6JxBLRTyTIfkecZPsImyXs41rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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