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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd3c61d3835a22201c3fd52668521b7dbe4f39af8137a4a35110869f515016c85' 
  AND token = 'Z2uLFsA0Tm8mCW94VGtHtsDQw2MD46P8FtGtswruXbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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