SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e3afd88c7c12295f155ee906088467f9d4407e40c6b823e9d42e1df46e5406d' 
  AND token = 'JTxo+ySIq6G8Yx/KGBFzukRB9PNCaAbwbrhxqZowxhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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