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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1919ed8e884466be4b74b88727d40e4b734d44c665c83dade950dbc2c6483cd7' 
  AND token = 'gkRlIFFY5a45Xf1Yb25XhS7kGsUd9lp2UI+H3d++cVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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