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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '18b12838a56c66d6c6f31075d328b06813cd336f9b740406a6da53ed2fc67026' 
  AND token = 'CxBBC8btzxD89xTKcMWWvQLMChu4NZfAHEI7bsHxm5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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