Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c617100401f5e45c58de74c69d19b55fa39ec33217c745fd9b63b2a576a6d31' 
  AND token = 'hNk9wJtqM7Tac2ijAF0dgkIKM+D5ZZJxbCFw7wVSC6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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