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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10041c566e8af5ba69d6f8142732bd983276eddd22e8d7ed5871c02c1a5c6925' 
  AND token = '+1gzuwxXPEvkmfsdxZsAEfwxYvjvepjxMlPmyMsPsGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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