Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80e6af219c2e221beab3b154b86536d5cae3147d09a2d5c74e640db2397d9545' 
  AND token = 'gNSEqUcSH2VpMUQObmfqS62WglBu1SyAa6k7yT4/6GA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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