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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1899dac64a2c622cabf0d7eb90d136d103a5be1416d39cbc59fba45259fe3ea4' 
  AND token = 'YRz6B9cFKg3BJadZ3IwU+7ACB16FWb/rD7eZdDFicUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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