Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80ca5f01f3bb0725c80a2375a3c3dd8e9a2440257e33b63e270ff426c4bc99ed' 
  AND token = 'yrJuyyB9IRLt513KeATIRM/dYTkG3teLmbEIBEF0tZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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