Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ad12f5dbec377b5f20720086003f71b60ecebc4d64b3feb5c286fd1232536a1' 
  AND token = 'ukF0hAtyFxgM2HLXKNn3H3MU8n6P+6yKeVarqQdoX5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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