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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2af6a3160cae87c8ce49a22b3caf7582afcc068206e530b9bec7e5f494db96bc' 
  AND token = 'qY2lqLa3KCWNCK159d098u0t41+y4ITRlDH2xU+6sgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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