Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd3115eec4dd3014369621d19747fe587e6db6f60791b9103f03c76ef5bb556b' 
  AND token = 'DnPsRlXyzLRErNUD2OplmIEV9lH9qKZv62BdhQm0oco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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