Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9409e16f933ea8522c53783a7d1ded0eb8c46b0038dd0282745066e9545e2d0d' 
  AND token = 'NcLICpl1BlmV8mbHn31dmIiNA7ULfblmHnSL+odzfgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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