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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3363bf7e7499688bc11cb1d92bfc12c66e5760b6c36ffaf8549f8fcacdb86861' 
  AND token = 'oWo2FfJxGq3MKlusrPqMjZyNoMNVQ6zciohqYaT1yaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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