SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a60d86fc4ba6be504160ac0bd1224227018c7ed370aa6e349cd10e8679b8cf9' 
  AND token = 'HJ26MB+2Gi5WvswKRH5MbVUZqrz5sFYuicwSyMSYfIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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