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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72078a7df26b42249bf46204f0701bb741b7b17f152c5406258b741b4ed56ee4' 
  AND token = 'vsrVyFYs1CLj46Mbl61BxTupxShInkfNZ1N7e4Bn5CY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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