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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a25fac075633392e4b09b07409470a23e7c37a3294c20f9e3c632d6bb12b1db5' 
  AND token = 'jNzQV4t1Tw0TG478WVNWk6WspXmOlWqDE41OaH3bKbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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