Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca762b8e6e8858056531df6b9c10d3ba7f6dcdc11f3428d9cb71d06081590c17' 
  AND token = 'oZnZERPEnGJI7jeMMsK4kQSkRhYtSGH7dlXiB1Gdt6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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