SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0069fd886db307c885923d8a52bd135e7ba261d2458bfa346c763b5bff3f2257' 
  AND token = 'JQD9v6rYmEqCajUSMGQbwy6vyqV3CyJAh4wbIM+GFuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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