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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61c72e08149ff5e4c683c73b745feeb8007cfe681254c3464228ecad13f72166' 
  AND token = 'O1Vgt2oGuokBMNNyRzkisLQSux98TSYMeQLCwpIshLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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