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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d91c59cd6ee849fe9e1c896d6279c6772de7b322e5a890ff2d002d25faffb29' 
  AND token = '60XyO27OwZbIu5NkspCedxI/8KyeV7iPzM3R7Bg0KpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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