Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d5b7b574c1ff364f7d9ac1abae08e907e58fb1824f1def7fd4d1c85ba80edc3' 
  AND token = 'UohBbd54GvczyD0CXk/+VMqbJvrPIQCNL66bRCJfwdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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