Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b241acb7d2033bf633ce2a051b255e445508df1cf7451bcf8f11e1ed64564681' 
  AND token = 'w+ODmkn70kjeanVahK2XGD5SpAt9MI/1n3mSnaG4ja4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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