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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07aae2639bec6c4162c7d1ec7864cacbb22bdd6039ee6e9126936e7401622846' 
  AND token = '40vZe9YpCYuO1RIMTYqX74zCY7DZKoo5mGJhsOKB7pE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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