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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c775865957dbe14ce54d9b22dc2a692a543af5abfb43f422ee2c96de6127a48' 
  AND token = 'Mcdf02lHQ/uJD6bkT0v0EouJRirrSdnjCaYG2yRmS9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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